- Signal
PWR
GND
Signal
As you can see from my calculation the width of the tracks are 0.25mm with a gap of 0.15mm.
![Image](https://www.hamtam.de/conet/microstrip.png)
Code: Select all
[33656.321046] usb 3-1.3.2: USB disconnect, device number 18
[33660.299860] usb 1-5: USB disconnect, device number 20
[33665.865270] usb 1-6: new high-speed USB device number 25 using xhci_hcd
[33666.006096] usb 1-6: New USB device found, idVendor=2f3f, idProduct=2001
[33666.006100] usb 1-6: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[33666.006102] usb 1-6: Product: CONET 8-ch-sc
[33666.006105] usb 1-6: Manufacturer: CONET Solutions GmbH
[33666.006106] usb 1-6: SerialNumber: 932184B3
[33671.062142] usb 1-6: parse_audio_format_rates_v2(): unable to find clock source (clock -71)
...
[33671.269216] usb 1-6: 1:1: usb_set_interface failed (-71)
[33676.377782] usb 1-6: cannot get ctl value: req = 0x81, wValue = 0x101, wIndex = 0xb00, type = 1
...
[33671.087823] usb 1-6: 10:0: cannot get min/max values for control 2 (id 10)
[33671.087902] usb 1-6: cannot get ctl value: req = 0x83, wValue = 0x201, wIndex = 0xa00, type = 4
.cannot load mixer controls: Protocol error
I have an continuous GND plane under the bus tracks. The current board has no keep out between the USB Bus tracks.
![Image](https://www.hamtam.de/conet/J25303.png)
![Image](https://www.hamtam.de/conet/shematic_USB.png)
The 24MHz Master Clock looks good on the oscilloscope.
The Debugger said but I do not know if it is related:
tile[1] core[2] (Suspended: Signal 'ET_LOAD_STORE' received. Description: Memory access exception.)
4 handle_audio_request() decouple.xc:493 0x00041b64
3 __kent() 0x00040766
2 __main__main_tile_1_task_decouple_4() main.xc:185 0x00040d0d
1 <symbol is not available> 0x00000000